<!DOCTYPE html>
<html lang='en'>
<head>
  <meta charset='UTF-8'>
  <meta http-equiv='X-UA-Compatible' content='IE=edge'>
  <meta name='viewport' content='width=device-width, initial-scale=1.0'>
  <title>React Document</title>
</head>
<body>
  <div id='test'></div>
  <script src='../js/react.development.js'></script>
  <script src='../js/react-dom.development.js'></script>
  <script src='../js/babel.min.js'></script>
  <script type='text/babel'>
    class Time extends React.Component {
      state = {date: new Date()}
      componentDidMount() {
        setInterval(() => {
          this.setState({
            date: new Date()
          })
        }, 1000)
      }
      render() {
        return (
          <div>
            <h1>不变的h1</h1>
            <input type="text" placeholder="不变的input"/>
            <br/>
            <span>现在是：{this.state.date.toTimeString()}
              <input type="text" placeholder="不变的input"/>
            </span>
          </div>
        )
      }
    }
    ReactDOM.render(<Time/>, document.getElementById('test'))
  </script>
</body>
</html>